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- PDB-7rz7: Structure of the complex of AMPA receptor GluA2 with auxiliary su... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7rz7 | |||||||||||||||
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Title | Structure of the complex of AMPA receptor GluA2 with auxiliary subunit TARP gamma-5 bound to agonist Quisqualate | |||||||||||||||
![]() | Glutamate receptor 2![]() | |||||||||||||||
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Function / homology | ![]() spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / AMPA glutamate receptor activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||||||||
Biological species | ![]() ![]() ![]() | |||||||||||||||
Method | ![]() ![]() ![]() | |||||||||||||||
![]() | Klykov, O.V. / Gangwar, S.P. / Yelshanskaya, M.V. / Sobolevsky, A.I. | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure and desensitization of AMPA receptor complexes with type II TARP γ5 and GSG1L. Authors: Oleg Klykov / Shanti Pal Gangwar / Maria V Yelshanskaya / Laura Yen / Alexander I Sobolevsky / ![]() Abstract: AMPA receptors (AMPARs) mediate the majority of excitatory neurotransmission. Their surface expression, trafficking, gating, and pharmacology are regulated by auxiliary subunits. Of the two types of ...AMPA receptors (AMPARs) mediate the majority of excitatory neurotransmission. Their surface expression, trafficking, gating, and pharmacology are regulated by auxiliary subunits. Of the two types of TARP auxiliary subunits, type I TARPs assume activating roles, while type II TARPs serve suppressive functions. We present cryo-EM structures of GluA2 AMPAR in complex with type II TARP γ5, which reduces steady-state currents, increases single-channel conductance, and slows recovery from desensitization. Regulation of AMPAR function depends on its ligand-binding domain (LBD) interaction with the γ5 head domain. GluA2-γ5 complex shows maximum stoichiometry of two TARPs per AMPAR tetramer, being different from type I TARPs but reminiscent of the auxiliary subunit GSG1L. Desensitization of both GluA2-GSG1L and GluA2-γ5 complexes is accompanied by rupture of LBD dimer interface, while GluA2-γ5 but not GluA2-GSG1L LBD dimers remain two-fold symmetric. Different structural architectures and desensitization mechanisms of complexes with auxiliary subunits endow AMPARs with broad functional capabilities. | |||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 628.1 KB | Display | ![]() |
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PDB format | ![]() | 518.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 24753MC ![]() 7ryyC ![]() 7ryzC ![]() 7rz4C ![]() 7rz5C ![]() 7rz6C ![]() 7rz8C ![]() 7rz9C ![]() 7rzaC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | ![]() Mass: 116018.000 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #2: Chemical | ChemComp-QUS / ( ![]() Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: GluA2 / Type: COMPLEX Details: Map displaying Amino-terminal, ligand binding, and transmembrane domain and auxiliary subunit TARP gamma-5 Entity ID: #1 / Source: RECOMBINANT | |||||||||||||||||||||||||
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Molecular weight | Experimental value: NO | |||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() ![]() | |||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() ![]() | |||||||||||||||||||||||||
Buffer solution | pH: 8 | |||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() Details: Protein extracted and reconstituted in detergent micelle | |||||||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: C-flat-1.2/1.3 | |||||||||||||||||||||||||
Vitrification![]() | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K Details: 1 mM Quisqualate was added to the purified protein and incubated on ice for 30 min before sample preparation |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() |
Image recording | Average exposure time: 2.5 sec. / Electron dose: 51.18 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 3 |
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Processing
EM software |
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CTF correction![]() | Type: NONE | ||||||||||||||||
Particle selection | Num. of particles selected: 5011050 | ||||||||||||||||
Symmetry | Point symmetry![]() ![]() | ||||||||||||||||
3D reconstruction![]() | Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 127928 / Symmetry type: POINT |